Diddy is on a mission to find the person who stole the numbers to his personal American Express Black Card and posted them on a web site this week.

Earlier this week, someone posted copies of the rap mogul's super exclusive credit card on a website, along with his passport and private phone numbers.

The website where the info is posted seems to make a vague reference to the ridiculous rumors that Diddy is a member of the Illuminati … a secret society rumored to run the world.

Sources close to Diddy say he is aware of the situation and has launched an internal investigation to find the person responsible.

A rep for Diddy had no comment.